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STABILITY ANALYSIS OF PRE-RELEASE AND RELEASED RICE HYBRIDS FOR GRAIN YIELD AND QUALITY CHARACTERS

KrishiKosh

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Title STABILITY ANALYSIS OF PRE-RELEASE AND RELEASED RICE HYBRIDS FOR GRAIN YIELD AND QUALITY CHARACTERS
 
Creator MADHUKAR, PAIDAKULA
 
Contributor SURENDER RAJU, CH
 
Subject yields, grain, hybrids, rice, developmental stages, genotypes, heterosis, planting, environment, animal husbandry
 
Description The present investigation carried out to study the stability, standard heterosis,
correlations and direct and indirect effects for yield and quality characters with18 hybrids
and 11 varieties in three locations of Telangana region of Andhra Pradesh revealed that
genotype x environment interaction was significant for all the characters. Significance of
non-linear component for all the characters except 1000 seed weight and seed yield per
plant indicated a non predictable nature in response of genotypes in changing environments
for these characters.
Among the hybrids, PAC-837 and US-382 for grain yield, PAC-837 and DRRH-3 for
productive tillers per plant, PA6201and VNR-204 for filled grains per panicle and PAC-
837, US-312 for 1000 seed weight were identified as stable genotypes.
For quality traits the hybrids, VNR-202, NK-5251, KRH-2, US-382 were identified as
best ones in general. Among varieties, RNR-6378 and RNR-2458 were better in quality.
Heterosis in desirable negative direction was not observed for plant height, but with
respect to panicle length, highly significant heterosis was observed especially on the check
BPT-5204 in all environments. Heterosis was in negative direction for productive tillers
plant in all the locations and pooled except at Rajendranagar. Seven hybrids with check
BPT-5204 and three hybrids with check MTU-1010 exhibited significant standard heterosis
in desirable direction.
Among the pre-release hybrids, CRHR-32 (104.66), NK-5251(97.56), TNAU RH
CO-4(69.78) were identified as better ones, based on per se and standard heterosis for filled
grains per panicle on over all consideration. Over the best check variety for yield (MTU-
1010), three hybrids (JRH-8, Indam 200-017 and KRH-2) at Kampasagar and only one
(JRH-8) on pooled basis recorded significant positive heterosis for 1000 grain weight.
For grain yield per plant, expression of heterosis was very high on BPT-5204,
however the number of heterotic hybrids and magnitude of standard heterosis drastically
reduced when it was estimated on the high yielding hybrid, DRRH-3 and on high yielding
variety, MTU-1010. When location wise performance was taken into consideration, the
expression of heterosis was observed to be fairly good only at Kampasagar on the check
MTU-1010 (9 hybrids) and the reason for good performance of certain hybrids for yield
was discribed to simultaneous heterosis for filled grains per panicle, panicle length in
addition to plant height. The pre-release hybrids, VNR-204 (overall basis) and NK-5251 (at
Kampasagar) and released hybrids, KRH-2 and DRRH-3 (check) proved to be superior for
grain yield per plant. The best high yielding popular variety, MTU-1010 was equally
comparable to best high yielding hybrids.
There was less number of heterotic hybrids for L/B ratio as compared to that of kernel
length because of simultaneous increase of kernel breadth of hybrids over BPT-5204 and
DRRH-3 (best checks for slenderness). Only two hybrids, TNAU RH CO-4 and PHB-71
registered significant negative heterosis for kernel breadth.
Only two hybrids, NK-5251 (Pre-release) and PHB-71 (released) registered better
performance for high HRR, which indicated much emphasis has to be paid for
improvement of kernel traits associated with HRR.
With respect to location wise correlations, plant height, karnel length in three
locations; Panicle length, effective tillers per plant, 1000 grain weight and kernel breadth in
two and number of grains per panicle in one location registered significant correlations with
grain yield, which indicated that relation between filled grains per panicle and yield was
highly variable in comparison to other relations.
Based on character association analysis, total no. of grains per plant, filled grains per
panicle and 1000 seed weight can be considered as prime yield components in hybrid rice
and there should be a balance between yield and height, as the later is highly influencing indirectly yield potential in hybrids through panicle length and grain per panicle.
 
Date 2016-06-14T11:53:32Z
2016-06-14T11:53:32Z
2013
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/67339
 
Language en
 
Relation D9324;
 
Format application/pdf
 
Publisher ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY